This Duracell charger delivers. Indeed, it is quite fast (much more than my old charger anyway that well put four hours to load a set of 4 batteries) and compact. It instructed my set of four batteries for camera in less than 2 hours. The fact that it can be folded (and the plug can be detached) makes it very convenient for travel, and it is the same in regard to its compatibility (between 100 and 240 volts and 50/60 Hz ). Good point also for the ability to load two different battery sizes. The system of diodes (red when charging, green when charged batteries, and flashing red when there is a problem) is classic, no revolution and no disappointment in this area. Fast and convenient, this charger does what is asked of him but attention, it does not discharge the batteries before recharging and especially it accepts as NiMH.